以太网首部的一个c语言程序，代码功能是对设备要传送的帧进行排队-Ethernet header c language program code function is queued frames to be transferred to the device

模拟的以太网数据帧，帧尾有正确的FCS值，一般用于校验编写代码的FCS校验功能是否正确-Analog Ethernet data frames, frame tail has the correct FCS value, generally used for checking the FCS check writing code functions correctly